The AquaOx whole house water filter unites science and technology with extreme fluidity. Water passes through six different filter media arranged in layers within the purification tank. Each successive layer, which contains a generous quantity of the required media, has been scientifically engineered to remove a specific set of contaminants. Each layer has also been optimized to ensure sufficient water contact time for removal of the targeted impurities. Simply put, the science and technology behind AquaOx delivers a more thorough and long-lasting purification process. No competitor has AquaOxs combination of features or matches the effectiveness of the AquaOx anywhere near its price. It's a Zero Maintenance Whole House Water Filtration System. Best Quality, Best Performance & Lowest Cost.